53fa71476d
on array and function declarators. This is pretty far from complete, and I'll revisit it later if someone doesn't beat me to it. llvm-svn: 122535
2020 lines
71 KiB
C++
2020 lines
71 KiB
C++
//===--- ParseExprCXX.cpp - C++ Expression Parsing ------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Expression parsing implementation for C++.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/ParseDiagnostic.h"
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#include "clang/Parse/Parser.h"
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#include "clang/Sema/DeclSpec.h"
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#include "clang/Sema/ParsedTemplate.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace clang;
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/// \brief Parse global scope or nested-name-specifier if present.
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///
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/// Parses a C++ global scope specifier ('::') or nested-name-specifier (which
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/// may be preceded by '::'). Note that this routine will not parse ::new or
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/// ::delete; it will just leave them in the token stream.
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///
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/// '::'[opt] nested-name-specifier
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/// '::'
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///
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/// nested-name-specifier:
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/// type-name '::'
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/// namespace-name '::'
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/// nested-name-specifier identifier '::'
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/// nested-name-specifier 'template'[opt] simple-template-id '::'
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///
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///
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/// \param SS the scope specifier that will be set to the parsed
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/// nested-name-specifier (or empty)
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///
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/// \param ObjectType if this nested-name-specifier is being parsed following
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/// the "." or "->" of a member access expression, this parameter provides the
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/// type of the object whose members are being accessed.
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///
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/// \param EnteringContext whether we will be entering into the context of
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/// the nested-name-specifier after parsing it.
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///
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/// \param MayBePseudoDestructor When non-NULL, points to a flag that
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/// indicates whether this nested-name-specifier may be part of a
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/// pseudo-destructor name. In this case, the flag will be set false
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/// if we don't actually end up parsing a destructor name. Moreorover,
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/// if we do end up determining that we are parsing a destructor name,
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/// the last component of the nested-name-specifier is not parsed as
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/// part of the scope specifier.
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/// member access expression, e.g., the \p T:: in \p p->T::m.
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///
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/// \returns true if there was an error parsing a scope specifier
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bool Parser::ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS,
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ParsedType ObjectType,
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bool EnteringContext,
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bool *MayBePseudoDestructor) {
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assert(getLang().CPlusPlus &&
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"Call sites of this function should be guarded by checking for C++");
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if (Tok.is(tok::annot_cxxscope)) {
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SS.setScopeRep(static_cast<NestedNameSpecifier*>(Tok.getAnnotationValue()));
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SS.setRange(Tok.getAnnotationRange());
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ConsumeToken();
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return false;
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}
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bool HasScopeSpecifier = false;
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if (Tok.is(tok::coloncolon)) {
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// ::new and ::delete aren't nested-name-specifiers.
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tok::TokenKind NextKind = NextToken().getKind();
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if (NextKind == tok::kw_new || NextKind == tok::kw_delete)
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return false;
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// '::' - Global scope qualifier.
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SourceLocation CCLoc = ConsumeToken();
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SS.setBeginLoc(CCLoc);
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SS.setScopeRep(Actions.ActOnCXXGlobalScopeSpecifier(getCurScope(), CCLoc));
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SS.setEndLoc(CCLoc);
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HasScopeSpecifier = true;
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}
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bool CheckForDestructor = false;
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if (MayBePseudoDestructor && *MayBePseudoDestructor) {
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CheckForDestructor = true;
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*MayBePseudoDestructor = false;
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}
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while (true) {
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if (HasScopeSpecifier) {
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// C++ [basic.lookup.classref]p5:
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// If the qualified-id has the form
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//
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// ::class-name-or-namespace-name::...
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//
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// the class-name-or-namespace-name is looked up in global scope as a
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// class-name or namespace-name.
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//
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// To implement this, we clear out the object type as soon as we've
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// seen a leading '::' or part of a nested-name-specifier.
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ObjectType = ParsedType();
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if (Tok.is(tok::code_completion)) {
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// Code completion for a nested-name-specifier, where the code
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// code completion token follows the '::'.
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Actions.CodeCompleteQualifiedId(getCurScope(), SS, EnteringContext);
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ConsumeCodeCompletionToken();
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}
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}
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// nested-name-specifier:
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// nested-name-specifier 'template'[opt] simple-template-id '::'
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// Parse the optional 'template' keyword, then make sure we have
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// 'identifier <' after it.
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if (Tok.is(tok::kw_template)) {
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// If we don't have a scope specifier or an object type, this isn't a
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// nested-name-specifier, since they aren't allowed to start with
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// 'template'.
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if (!HasScopeSpecifier && !ObjectType)
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break;
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TentativeParsingAction TPA(*this);
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SourceLocation TemplateKWLoc = ConsumeToken();
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UnqualifiedId TemplateName;
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if (Tok.is(tok::identifier)) {
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// Consume the identifier.
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TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
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ConsumeToken();
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} else if (Tok.is(tok::kw_operator)) {
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if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType,
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TemplateName)) {
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TPA.Commit();
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break;
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}
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if (TemplateName.getKind() != UnqualifiedId::IK_OperatorFunctionId &&
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TemplateName.getKind() != UnqualifiedId::IK_LiteralOperatorId) {
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Diag(TemplateName.getSourceRange().getBegin(),
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diag::err_id_after_template_in_nested_name_spec)
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<< TemplateName.getSourceRange();
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TPA.Commit();
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break;
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}
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} else {
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TPA.Revert();
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break;
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}
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// If the next token is not '<', we have a qualified-id that refers
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// to a template name, such as T::template apply, but is not a
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// template-id.
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if (Tok.isNot(tok::less)) {
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TPA.Revert();
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break;
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}
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// Commit to parsing the template-id.
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TPA.Commit();
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TemplateTy Template;
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if (TemplateNameKind TNK = Actions.ActOnDependentTemplateName(getCurScope(),
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TemplateKWLoc,
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SS,
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TemplateName,
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ObjectType,
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EnteringContext,
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Template)) {
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if (AnnotateTemplateIdToken(Template, TNK, &SS, TemplateName,
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TemplateKWLoc, false))
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return true;
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} else
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return true;
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continue;
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}
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if (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) {
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// We have
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//
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// simple-template-id '::'
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//
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// So we need to check whether the simple-template-id is of the
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// right kind (it should name a type or be dependent), and then
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// convert it into a type within the nested-name-specifier.
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TemplateIdAnnotation *TemplateId
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= static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
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if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde)) {
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*MayBePseudoDestructor = true;
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return false;
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}
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if (TemplateId->Kind == TNK_Type_template ||
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TemplateId->Kind == TNK_Dependent_template_name) {
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AnnotateTemplateIdTokenAsType(&SS);
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assert(Tok.is(tok::annot_typename) &&
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"AnnotateTemplateIdTokenAsType isn't working");
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Token TypeToken = Tok;
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ConsumeToken();
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assert(Tok.is(tok::coloncolon) && "NextToken() not working properly!");
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SourceLocation CCLoc = ConsumeToken();
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if (!HasScopeSpecifier) {
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SS.setBeginLoc(TypeToken.getLocation());
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HasScopeSpecifier = true;
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}
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if (ParsedType T = getTypeAnnotation(TypeToken)) {
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CXXScopeTy *Scope =
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Actions.ActOnCXXNestedNameSpecifier(getCurScope(), SS, T,
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TypeToken.getAnnotationRange(),
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CCLoc);
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SS.setScopeRep(Scope);
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} else
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SS.setScopeRep(0);
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SS.setEndLoc(CCLoc);
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continue;
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}
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assert(false && "FIXME: Only type template names supported here");
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}
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// The rest of the nested-name-specifier possibilities start with
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// tok::identifier.
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if (Tok.isNot(tok::identifier))
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break;
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IdentifierInfo &II = *Tok.getIdentifierInfo();
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// nested-name-specifier:
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// type-name '::'
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// namespace-name '::'
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// nested-name-specifier identifier '::'
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Token Next = NextToken();
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// If we get foo:bar, this is almost certainly a typo for foo::bar. Recover
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// and emit a fixit hint for it.
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if (Next.is(tok::colon) && !ColonIsSacred) {
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if (Actions.IsInvalidUnlessNestedName(getCurScope(), SS, II, ObjectType,
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EnteringContext) &&
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// If the token after the colon isn't an identifier, it's still an
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// error, but they probably meant something else strange so don't
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// recover like this.
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PP.LookAhead(1).is(tok::identifier)) {
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Diag(Next, diag::err_unexected_colon_in_nested_name_spec)
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<< FixItHint::CreateReplacement(Next.getLocation(), "::");
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// Recover as if the user wrote '::'.
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Next.setKind(tok::coloncolon);
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}
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}
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if (Next.is(tok::coloncolon)) {
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if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde) &&
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!Actions.isNonTypeNestedNameSpecifier(getCurScope(), SS, Tok.getLocation(),
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II, ObjectType)) {
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*MayBePseudoDestructor = true;
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return false;
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}
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// We have an identifier followed by a '::'. Lookup this name
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// as the name in a nested-name-specifier.
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SourceLocation IdLoc = ConsumeToken();
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assert((Tok.is(tok::coloncolon) || Tok.is(tok::colon)) &&
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"NextToken() not working properly!");
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SourceLocation CCLoc = ConsumeToken();
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if (!HasScopeSpecifier) {
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SS.setBeginLoc(IdLoc);
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HasScopeSpecifier = true;
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}
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if (!SS.isInvalid())
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SS.setScopeRep(
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Actions.ActOnCXXNestedNameSpecifier(getCurScope(), SS, IdLoc, CCLoc, II,
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ObjectType, EnteringContext));
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SS.setEndLoc(CCLoc);
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continue;
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}
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// nested-name-specifier:
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// type-name '<'
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if (Next.is(tok::less)) {
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TemplateTy Template;
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UnqualifiedId TemplateName;
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TemplateName.setIdentifier(&II, Tok.getLocation());
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bool MemberOfUnknownSpecialization;
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if (TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS,
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/*hasTemplateKeyword=*/false,
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TemplateName,
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ObjectType,
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EnteringContext,
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Template,
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MemberOfUnknownSpecialization)) {
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// We have found a template name, so annotate this this token
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// with a template-id annotation. We do not permit the
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// template-id to be translated into a type annotation,
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// because some clients (e.g., the parsing of class template
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// specializations) still want to see the original template-id
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// token.
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ConsumeToken();
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if (AnnotateTemplateIdToken(Template, TNK, &SS, TemplateName,
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SourceLocation(), false))
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return true;
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continue;
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}
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if (MemberOfUnknownSpecialization && (ObjectType || SS.isSet()) &&
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IsTemplateArgumentList(1)) {
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// We have something like t::getAs<T>, where getAs is a
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// member of an unknown specialization. However, this will only
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// parse correctly as a template, so suggest the keyword 'template'
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// before 'getAs' and treat this as a dependent template name.
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Diag(Tok.getLocation(), diag::err_missing_dependent_template_keyword)
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<< II.getName()
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<< FixItHint::CreateInsertion(Tok.getLocation(), "template ");
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if (TemplateNameKind TNK
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= Actions.ActOnDependentTemplateName(getCurScope(),
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Tok.getLocation(), SS,
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TemplateName, ObjectType,
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EnteringContext, Template)) {
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// Consume the identifier.
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ConsumeToken();
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if (AnnotateTemplateIdToken(Template, TNK, &SS, TemplateName,
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SourceLocation(), false))
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return true;
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}
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else
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return true;
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continue;
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}
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}
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// We don't have any tokens that form the beginning of a
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// nested-name-specifier, so we're done.
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break;
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}
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// Even if we didn't see any pieces of a nested-name-specifier, we
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// still check whether there is a tilde in this position, which
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// indicates a potential pseudo-destructor.
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if (CheckForDestructor && Tok.is(tok::tilde))
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*MayBePseudoDestructor = true;
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return false;
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}
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/// ParseCXXIdExpression - Handle id-expression.
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///
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/// id-expression:
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/// unqualified-id
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/// qualified-id
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///
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/// qualified-id:
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/// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
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/// '::' identifier
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/// '::' operator-function-id
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/// '::' template-id
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///
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/// NOTE: The standard specifies that, for qualified-id, the parser does not
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/// expect:
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///
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/// '::' conversion-function-id
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/// '::' '~' class-name
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///
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/// This may cause a slight inconsistency on diagnostics:
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///
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/// class C {};
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/// namespace A {}
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/// void f() {
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/// :: A :: ~ C(); // Some Sema error about using destructor with a
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/// // namespace.
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/// :: ~ C(); // Some Parser error like 'unexpected ~'.
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/// }
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///
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/// We simplify the parser a bit and make it work like:
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///
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/// qualified-id:
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/// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
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/// '::' unqualified-id
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///
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/// That way Sema can handle and report similar errors for namespaces and the
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/// global scope.
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///
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/// The isAddressOfOperand parameter indicates that this id-expression is a
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/// direct operand of the address-of operator. This is, besides member contexts,
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/// the only place where a qualified-id naming a non-static class member may
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/// appear.
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///
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ExprResult Parser::ParseCXXIdExpression(bool isAddressOfOperand) {
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// qualified-id:
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// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
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// '::' unqualified-id
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//
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CXXScopeSpec SS;
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ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false);
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UnqualifiedId Name;
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if (ParseUnqualifiedId(SS,
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/*EnteringContext=*/false,
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/*AllowDestructorName=*/false,
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/*AllowConstructorName=*/false,
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/*ObjectType=*/ ParsedType(),
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Name))
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return ExprError();
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// This is only the direct operand of an & operator if it is not
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// followed by a postfix-expression suffix.
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if (isAddressOfOperand && isPostfixExpressionSuffixStart())
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isAddressOfOperand = false;
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return Actions.ActOnIdExpression(getCurScope(), SS, Name, Tok.is(tok::l_paren),
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isAddressOfOperand);
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}
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/// ParseCXXCasts - This handles the various ways to cast expressions to another
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/// type.
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///
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/// postfix-expression: [C++ 5.2p1]
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/// 'dynamic_cast' '<' type-name '>' '(' expression ')'
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/// 'static_cast' '<' type-name '>' '(' expression ')'
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/// 'reinterpret_cast' '<' type-name '>' '(' expression ')'
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/// 'const_cast' '<' type-name '>' '(' expression ')'
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///
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ExprResult Parser::ParseCXXCasts() {
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tok::TokenKind Kind = Tok.getKind();
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const char *CastName = 0; // For error messages
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switch (Kind) {
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default: assert(0 && "Unknown C++ cast!"); abort();
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case tok::kw_const_cast: CastName = "const_cast"; break;
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case tok::kw_dynamic_cast: CastName = "dynamic_cast"; break;
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case tok::kw_reinterpret_cast: CastName = "reinterpret_cast"; break;
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case tok::kw_static_cast: CastName = "static_cast"; break;
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}
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SourceLocation OpLoc = ConsumeToken();
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SourceLocation LAngleBracketLoc = Tok.getLocation();
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if (ExpectAndConsume(tok::less, diag::err_expected_less_after, CastName))
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return ExprError();
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TypeResult CastTy = ParseTypeName();
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SourceLocation RAngleBracketLoc = Tok.getLocation();
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if (ExpectAndConsume(tok::greater, diag::err_expected_greater))
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return ExprError(Diag(LAngleBracketLoc, diag::note_matching) << "<");
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SourceLocation LParenLoc = Tok.getLocation(), RParenLoc;
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if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, CastName))
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return ExprError();
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ExprResult Result = ParseExpression();
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// Match the ')'.
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RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
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if (!Result.isInvalid() && !CastTy.isInvalid())
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Result = Actions.ActOnCXXNamedCast(OpLoc, Kind,
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LAngleBracketLoc, CastTy.get(),
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RAngleBracketLoc,
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LParenLoc, Result.take(), RParenLoc);
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return move(Result);
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}
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/// ParseCXXTypeid - This handles the C++ typeid expression.
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///
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/// postfix-expression: [C++ 5.2p1]
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/// 'typeid' '(' expression ')'
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/// 'typeid' '(' type-id ')'
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///
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ExprResult Parser::ParseCXXTypeid() {
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assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!");
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SourceLocation OpLoc = ConsumeToken();
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SourceLocation LParenLoc = Tok.getLocation();
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SourceLocation RParenLoc;
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// typeid expressions are always parenthesized.
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if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
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"typeid"))
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return ExprError();
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ExprResult Result;
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if (isTypeIdInParens()) {
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TypeResult Ty = ParseTypeName();
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// Match the ')'.
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RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
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if (Ty.isInvalid() || RParenLoc.isInvalid())
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return ExprError();
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|
|
Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/true,
|
|
Ty.get().getAsOpaquePtr(), RParenLoc);
|
|
} else {
|
|
// C++0x [expr.typeid]p3:
|
|
// When typeid is applied to an expression other than an lvalue of a
|
|
// polymorphic class type [...] The expression is an unevaluated
|
|
// operand (Clause 5).
|
|
//
|
|
// Note that we can't tell whether the expression is an lvalue of a
|
|
// polymorphic class type until after we've parsed the expression, so
|
|
// we the expression is potentially potentially evaluated.
|
|
EnterExpressionEvaluationContext Unevaluated(Actions,
|
|
Sema::PotentiallyPotentiallyEvaluated);
|
|
Result = ParseExpression();
|
|
|
|
// Match the ')'.
|
|
if (Result.isInvalid())
|
|
SkipUntil(tok::r_paren);
|
|
else {
|
|
RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
if (RParenLoc.isInvalid())
|
|
return ExprError();
|
|
|
|
Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/false,
|
|
Result.release(), RParenLoc);
|
|
}
|
|
}
|
|
|
|
return move(Result);
|
|
}
|
|
|
|
/// ParseCXXUuidof - This handles the Microsoft C++ __uuidof expression.
|
|
///
|
|
/// '__uuidof' '(' expression ')'
|
|
/// '__uuidof' '(' type-id ')'
|
|
///
|
|
ExprResult Parser::ParseCXXUuidof() {
|
|
assert(Tok.is(tok::kw___uuidof) && "Not '__uuidof'!");
|
|
|
|
SourceLocation OpLoc = ConsumeToken();
|
|
SourceLocation LParenLoc = Tok.getLocation();
|
|
SourceLocation RParenLoc;
|
|
|
|
// __uuidof expressions are always parenthesized.
|
|
if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
|
|
"__uuidof"))
|
|
return ExprError();
|
|
|
|
ExprResult Result;
|
|
|
|
if (isTypeIdInParens()) {
|
|
TypeResult Ty = ParseTypeName();
|
|
|
|
// Match the ')'.
|
|
RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
if (Ty.isInvalid())
|
|
return ExprError();
|
|
|
|
Result = Actions.ActOnCXXUuidof(OpLoc, LParenLoc, /*isType=*/true,
|
|
Ty.get().getAsOpaquePtr(), RParenLoc);
|
|
} else {
|
|
EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated);
|
|
Result = ParseExpression();
|
|
|
|
// Match the ')'.
|
|
if (Result.isInvalid())
|
|
SkipUntil(tok::r_paren);
|
|
else {
|
|
RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
Result = Actions.ActOnCXXUuidof(OpLoc, LParenLoc, /*isType=*/false,
|
|
Result.release(), RParenLoc);
|
|
}
|
|
}
|
|
|
|
return move(Result);
|
|
}
|
|
|
|
/// \brief Parse a C++ pseudo-destructor expression after the base,
|
|
/// . or -> operator, and nested-name-specifier have already been
|
|
/// parsed.
|
|
///
|
|
/// postfix-expression: [C++ 5.2]
|
|
/// postfix-expression . pseudo-destructor-name
|
|
/// postfix-expression -> pseudo-destructor-name
|
|
///
|
|
/// pseudo-destructor-name:
|
|
/// ::[opt] nested-name-specifier[opt] type-name :: ~type-name
|
|
/// ::[opt] nested-name-specifier template simple-template-id ::
|
|
/// ~type-name
|
|
/// ::[opt] nested-name-specifier[opt] ~type-name
|
|
///
|
|
ExprResult
|
|
Parser::ParseCXXPseudoDestructor(ExprArg Base, SourceLocation OpLoc,
|
|
tok::TokenKind OpKind,
|
|
CXXScopeSpec &SS,
|
|
ParsedType ObjectType) {
|
|
// We're parsing either a pseudo-destructor-name or a dependent
|
|
// member access that has the same form as a
|
|
// pseudo-destructor-name. We parse both in the same way and let
|
|
// the action model sort them out.
|
|
//
|
|
// Note that the ::[opt] nested-name-specifier[opt] has already
|
|
// been parsed, and if there was a simple-template-id, it has
|
|
// been coalesced into a template-id annotation token.
|
|
UnqualifiedId FirstTypeName;
|
|
SourceLocation CCLoc;
|
|
if (Tok.is(tok::identifier)) {
|
|
FirstTypeName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
|
|
ConsumeToken();
|
|
assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail");
|
|
CCLoc = ConsumeToken();
|
|
} else if (Tok.is(tok::annot_template_id)) {
|
|
FirstTypeName.setTemplateId(
|
|
(TemplateIdAnnotation *)Tok.getAnnotationValue());
|
|
ConsumeToken();
|
|
assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail");
|
|
CCLoc = ConsumeToken();
|
|
} else {
|
|
FirstTypeName.setIdentifier(0, SourceLocation());
|
|
}
|
|
|
|
// Parse the tilde.
|
|
assert(Tok.is(tok::tilde) && "ParseOptionalCXXScopeSpecifier fail");
|
|
SourceLocation TildeLoc = ConsumeToken();
|
|
if (!Tok.is(tok::identifier)) {
|
|
Diag(Tok, diag::err_destructor_tilde_identifier);
|
|
return ExprError();
|
|
}
|
|
|
|
// Parse the second type.
|
|
UnqualifiedId SecondTypeName;
|
|
IdentifierInfo *Name = Tok.getIdentifierInfo();
|
|
SourceLocation NameLoc = ConsumeToken();
|
|
SecondTypeName.setIdentifier(Name, NameLoc);
|
|
|
|
// If there is a '<', the second type name is a template-id. Parse
|
|
// it as such.
|
|
if (Tok.is(tok::less) &&
|
|
ParseUnqualifiedIdTemplateId(SS, Name, NameLoc, false, ObjectType,
|
|
SecondTypeName, /*AssumeTemplateName=*/true,
|
|
/*TemplateKWLoc*/SourceLocation()))
|
|
return ExprError();
|
|
|
|
return Actions.ActOnPseudoDestructorExpr(getCurScope(), Base,
|
|
OpLoc, OpKind,
|
|
SS, FirstTypeName, CCLoc,
|
|
TildeLoc, SecondTypeName,
|
|
Tok.is(tok::l_paren));
|
|
}
|
|
|
|
/// ParseCXXBoolLiteral - This handles the C++ Boolean literals.
|
|
///
|
|
/// boolean-literal: [C++ 2.13.5]
|
|
/// 'true'
|
|
/// 'false'
|
|
ExprResult Parser::ParseCXXBoolLiteral() {
|
|
tok::TokenKind Kind = Tok.getKind();
|
|
return Actions.ActOnCXXBoolLiteral(ConsumeToken(), Kind);
|
|
}
|
|
|
|
/// ParseThrowExpression - This handles the C++ throw expression.
|
|
///
|
|
/// throw-expression: [C++ 15]
|
|
/// 'throw' assignment-expression[opt]
|
|
ExprResult Parser::ParseThrowExpression() {
|
|
assert(Tok.is(tok::kw_throw) && "Not throw!");
|
|
SourceLocation ThrowLoc = ConsumeToken(); // Eat the throw token.
|
|
|
|
// If the current token isn't the start of an assignment-expression,
|
|
// then the expression is not present. This handles things like:
|
|
// "C ? throw : (void)42", which is crazy but legal.
|
|
switch (Tok.getKind()) { // FIXME: move this predicate somewhere common.
|
|
case tok::semi:
|
|
case tok::r_paren:
|
|
case tok::r_square:
|
|
case tok::r_brace:
|
|
case tok::colon:
|
|
case tok::comma:
|
|
return Actions.ActOnCXXThrow(ThrowLoc, 0);
|
|
|
|
default:
|
|
ExprResult Expr(ParseAssignmentExpression());
|
|
if (Expr.isInvalid()) return move(Expr);
|
|
return Actions.ActOnCXXThrow(ThrowLoc, Expr.take());
|
|
}
|
|
}
|
|
|
|
/// ParseCXXThis - This handles the C++ 'this' pointer.
|
|
///
|
|
/// C++ 9.3.2: In the body of a non-static member function, the keyword this is
|
|
/// a non-lvalue expression whose value is the address of the object for which
|
|
/// the function is called.
|
|
ExprResult Parser::ParseCXXThis() {
|
|
assert(Tok.is(tok::kw_this) && "Not 'this'!");
|
|
SourceLocation ThisLoc = ConsumeToken();
|
|
return Actions.ActOnCXXThis(ThisLoc);
|
|
}
|
|
|
|
/// ParseCXXTypeConstructExpression - Parse construction of a specified type.
|
|
/// Can be interpreted either as function-style casting ("int(x)")
|
|
/// or class type construction ("ClassType(x,y,z)")
|
|
/// or creation of a value-initialized type ("int()").
|
|
///
|
|
/// postfix-expression: [C++ 5.2p1]
|
|
/// simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3]
|
|
/// typename-specifier '(' expression-list[opt] ')' [TODO]
|
|
///
|
|
ExprResult
|
|
Parser::ParseCXXTypeConstructExpression(const DeclSpec &DS) {
|
|
Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
|
|
ParsedType TypeRep = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get();
|
|
|
|
assert(Tok.is(tok::l_paren) && "Expected '('!");
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
|
|
ExprVector Exprs(Actions);
|
|
CommaLocsTy CommaLocs;
|
|
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
if (ParseExpressionList(Exprs, CommaLocs)) {
|
|
SkipUntil(tok::r_paren);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
// Match the ')'.
|
|
SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
// TypeRep could be null, if it references an invalid typedef.
|
|
if (!TypeRep)
|
|
return ExprError();
|
|
|
|
assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&&
|
|
"Unexpected number of commas!");
|
|
return Actions.ActOnCXXTypeConstructExpr(TypeRep, LParenLoc, move_arg(Exprs),
|
|
RParenLoc);
|
|
}
|
|
|
|
/// ParseCXXCondition - if/switch/while condition expression.
|
|
///
|
|
/// condition:
|
|
/// expression
|
|
/// type-specifier-seq declarator '=' assignment-expression
|
|
/// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt]
|
|
/// '=' assignment-expression
|
|
///
|
|
/// \param ExprResult if the condition was parsed as an expression, the
|
|
/// parsed expression.
|
|
///
|
|
/// \param DeclResult if the condition was parsed as a declaration, the
|
|
/// parsed declaration.
|
|
///
|
|
/// \param Loc The location of the start of the statement that requires this
|
|
/// condition, e.g., the "for" in a for loop.
|
|
///
|
|
/// \param ConvertToBoolean Whether the condition expression should be
|
|
/// converted to a boolean value.
|
|
///
|
|
/// \returns true if there was a parsing, false otherwise.
|
|
bool Parser::ParseCXXCondition(ExprResult &ExprOut,
|
|
Decl *&DeclOut,
|
|
SourceLocation Loc,
|
|
bool ConvertToBoolean) {
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Condition);
|
|
ConsumeCodeCompletionToken();
|
|
}
|
|
|
|
if (!isCXXConditionDeclaration()) {
|
|
// Parse the expression.
|
|
ExprOut = ParseExpression(); // expression
|
|
DeclOut = 0;
|
|
if (ExprOut.isInvalid())
|
|
return true;
|
|
|
|
// If required, convert to a boolean value.
|
|
if (ConvertToBoolean)
|
|
ExprOut
|
|
= Actions.ActOnBooleanCondition(getCurScope(), Loc, ExprOut.get());
|
|
return ExprOut.isInvalid();
|
|
}
|
|
|
|
// type-specifier-seq
|
|
DeclSpec DS;
|
|
ParseSpecifierQualifierList(DS);
|
|
|
|
// declarator
|
|
Declarator DeclaratorInfo(DS, Declarator::ConditionContext);
|
|
ParseDeclarator(DeclaratorInfo);
|
|
|
|
// simple-asm-expr[opt]
|
|
if (Tok.is(tok::kw_asm)) {
|
|
SourceLocation Loc;
|
|
ExprResult AsmLabel(ParseSimpleAsm(&Loc));
|
|
if (AsmLabel.isInvalid()) {
|
|
SkipUntil(tok::semi);
|
|
return true;
|
|
}
|
|
DeclaratorInfo.setAsmLabel(AsmLabel.release());
|
|
DeclaratorInfo.SetRangeEnd(Loc);
|
|
}
|
|
|
|
// If attributes are present, parse them.
|
|
MaybeParseGNUAttributes(DeclaratorInfo);
|
|
|
|
// Type-check the declaration itself.
|
|
DeclResult Dcl = Actions.ActOnCXXConditionDeclaration(getCurScope(),
|
|
DeclaratorInfo);
|
|
DeclOut = Dcl.get();
|
|
ExprOut = ExprError();
|
|
|
|
// '=' assignment-expression
|
|
if (isTokenEqualOrMistypedEqualEqual(
|
|
diag::err_invalid_equalequal_after_declarator)) {
|
|
SourceLocation EqualLoc = ConsumeToken();
|
|
ExprResult AssignExpr(ParseAssignmentExpression());
|
|
if (!AssignExpr.isInvalid())
|
|
Actions.AddInitializerToDecl(DeclOut, AssignExpr.take());
|
|
} else {
|
|
// FIXME: C++0x allows a braced-init-list
|
|
Diag(Tok, diag::err_expected_equal_after_declarator);
|
|
}
|
|
|
|
// FIXME: Build a reference to this declaration? Convert it to bool?
|
|
// (This is currently handled by Sema).
|
|
|
|
return false;
|
|
}
|
|
|
|
/// \brief Determine whether the current token starts a C++
|
|
/// simple-type-specifier.
|
|
bool Parser::isCXXSimpleTypeSpecifier() const {
|
|
switch (Tok.getKind()) {
|
|
case tok::annot_typename:
|
|
case tok::kw_short:
|
|
case tok::kw_long:
|
|
case tok::kw_signed:
|
|
case tok::kw_unsigned:
|
|
case tok::kw_void:
|
|
case tok::kw_char:
|
|
case tok::kw_int:
|
|
case tok::kw_float:
|
|
case tok::kw_double:
|
|
case tok::kw_wchar_t:
|
|
case tok::kw_char16_t:
|
|
case tok::kw_char32_t:
|
|
case tok::kw_bool:
|
|
// FIXME: C++0x decltype support.
|
|
// GNU typeof support.
|
|
case tok::kw_typeof:
|
|
return true;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers.
|
|
/// This should only be called when the current token is known to be part of
|
|
/// simple-type-specifier.
|
|
///
|
|
/// simple-type-specifier:
|
|
/// '::'[opt] nested-name-specifier[opt] type-name
|
|
/// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO]
|
|
/// char
|
|
/// wchar_t
|
|
/// bool
|
|
/// short
|
|
/// int
|
|
/// long
|
|
/// signed
|
|
/// unsigned
|
|
/// float
|
|
/// double
|
|
/// void
|
|
/// [GNU] typeof-specifier
|
|
/// [C++0x] auto [TODO]
|
|
///
|
|
/// type-name:
|
|
/// class-name
|
|
/// enum-name
|
|
/// typedef-name
|
|
///
|
|
void Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) {
|
|
DS.SetRangeStart(Tok.getLocation());
|
|
const char *PrevSpec;
|
|
unsigned DiagID;
|
|
SourceLocation Loc = Tok.getLocation();
|
|
|
|
switch (Tok.getKind()) {
|
|
case tok::identifier: // foo::bar
|
|
case tok::coloncolon: // ::foo::bar
|
|
assert(0 && "Annotation token should already be formed!");
|
|
default:
|
|
assert(0 && "Not a simple-type-specifier token!");
|
|
abort();
|
|
|
|
// type-name
|
|
case tok::annot_typename: {
|
|
DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID,
|
|
getTypeAnnotation(Tok));
|
|
|
|
DS.SetRangeEnd(Tok.getAnnotationEndLoc());
|
|
ConsumeToken();
|
|
|
|
// Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
|
|
// is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
|
|
// Objective-C interface. If we don't have Objective-C or a '<', this is
|
|
// just a normal reference to a typedef name.
|
|
if (Tok.is(tok::less) && getLang().ObjC1)
|
|
ParseObjCProtocolQualifiers(DS);
|
|
|
|
DS.Finish(Diags, PP);
|
|
return;
|
|
}
|
|
|
|
// builtin types
|
|
case tok::kw_short:
|
|
DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_long:
|
|
DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_signed:
|
|
DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_unsigned:
|
|
DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_void:
|
|
DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_char:
|
|
DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_int:
|
|
DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_float:
|
|
DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_double:
|
|
DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_wchar_t:
|
|
DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_char16_t:
|
|
DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_char32_t:
|
|
DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID);
|
|
break;
|
|
case tok::kw_bool:
|
|
DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID);
|
|
break;
|
|
|
|
// FIXME: C++0x decltype support.
|
|
// GNU typeof support.
|
|
case tok::kw_typeof:
|
|
ParseTypeofSpecifier(DS);
|
|
DS.Finish(Diags, PP);
|
|
return;
|
|
}
|
|
if (Tok.is(tok::annot_typename))
|
|
DS.SetRangeEnd(Tok.getAnnotationEndLoc());
|
|
else
|
|
DS.SetRangeEnd(Tok.getLocation());
|
|
ConsumeToken();
|
|
DS.Finish(Diags, PP);
|
|
}
|
|
|
|
/// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++
|
|
/// [dcl.name]), which is a non-empty sequence of type-specifiers,
|
|
/// e.g., "const short int". Note that the DeclSpec is *not* finished
|
|
/// by parsing the type-specifier-seq, because these sequences are
|
|
/// typically followed by some form of declarator. Returns true and
|
|
/// emits diagnostics if this is not a type-specifier-seq, false
|
|
/// otherwise.
|
|
///
|
|
/// type-specifier-seq: [C++ 8.1]
|
|
/// type-specifier type-specifier-seq[opt]
|
|
///
|
|
bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) {
|
|
DS.SetRangeStart(Tok.getLocation());
|
|
const char *PrevSpec = 0;
|
|
unsigned DiagID;
|
|
bool isInvalid = 0;
|
|
|
|
// Parse one or more of the type specifiers.
|
|
if (!ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
|
|
ParsedTemplateInfo(), /*SuppressDeclarations*/true)) {
|
|
Diag(Tok, diag::err_expected_type);
|
|
return true;
|
|
}
|
|
|
|
while (ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
|
|
ParsedTemplateInfo(), /*SuppressDeclarations*/true))
|
|
{}
|
|
|
|
DS.Finish(Diags, PP);
|
|
return false;
|
|
}
|
|
|
|
/// \brief Finish parsing a C++ unqualified-id that is a template-id of
|
|
/// some form.
|
|
///
|
|
/// This routine is invoked when a '<' is encountered after an identifier or
|
|
/// operator-function-id is parsed by \c ParseUnqualifiedId() to determine
|
|
/// whether the unqualified-id is actually a template-id. This routine will
|
|
/// then parse the template arguments and form the appropriate template-id to
|
|
/// return to the caller.
|
|
///
|
|
/// \param SS the nested-name-specifier that precedes this template-id, if
|
|
/// we're actually parsing a qualified-id.
|
|
///
|
|
/// \param Name for constructor and destructor names, this is the actual
|
|
/// identifier that may be a template-name.
|
|
///
|
|
/// \param NameLoc the location of the class-name in a constructor or
|
|
/// destructor.
|
|
///
|
|
/// \param EnteringContext whether we're entering the scope of the
|
|
/// nested-name-specifier.
|
|
///
|
|
/// \param ObjectType if this unqualified-id occurs within a member access
|
|
/// expression, the type of the base object whose member is being accessed.
|
|
///
|
|
/// \param Id as input, describes the template-name or operator-function-id
|
|
/// that precedes the '<'. If template arguments were parsed successfully,
|
|
/// will be updated with the template-id.
|
|
///
|
|
/// \param AssumeTemplateId When true, this routine will assume that the name
|
|
/// refers to a template without performing name lookup to verify.
|
|
///
|
|
/// \returns true if a parse error occurred, false otherwise.
|
|
bool Parser::ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
|
|
IdentifierInfo *Name,
|
|
SourceLocation NameLoc,
|
|
bool EnteringContext,
|
|
ParsedType ObjectType,
|
|
UnqualifiedId &Id,
|
|
bool AssumeTemplateId,
|
|
SourceLocation TemplateKWLoc) {
|
|
assert((AssumeTemplateId || Tok.is(tok::less)) &&
|
|
"Expected '<' to finish parsing a template-id");
|
|
|
|
TemplateTy Template;
|
|
TemplateNameKind TNK = TNK_Non_template;
|
|
switch (Id.getKind()) {
|
|
case UnqualifiedId::IK_Identifier:
|
|
case UnqualifiedId::IK_OperatorFunctionId:
|
|
case UnqualifiedId::IK_LiteralOperatorId:
|
|
if (AssumeTemplateId) {
|
|
TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc, SS,
|
|
Id, ObjectType, EnteringContext,
|
|
Template);
|
|
if (TNK == TNK_Non_template)
|
|
return true;
|
|
} else {
|
|
bool MemberOfUnknownSpecialization;
|
|
TNK = Actions.isTemplateName(getCurScope(), SS,
|
|
TemplateKWLoc.isValid(), Id,
|
|
ObjectType, EnteringContext, Template,
|
|
MemberOfUnknownSpecialization);
|
|
|
|
if (TNK == TNK_Non_template && MemberOfUnknownSpecialization &&
|
|
ObjectType && IsTemplateArgumentList()) {
|
|
// We have something like t->getAs<T>(), where getAs is a
|
|
// member of an unknown specialization. However, this will only
|
|
// parse correctly as a template, so suggest the keyword 'template'
|
|
// before 'getAs' and treat this as a dependent template name.
|
|
std::string Name;
|
|
if (Id.getKind() == UnqualifiedId::IK_Identifier)
|
|
Name = Id.Identifier->getName();
|
|
else {
|
|
Name = "operator ";
|
|
if (Id.getKind() == UnqualifiedId::IK_OperatorFunctionId)
|
|
Name += getOperatorSpelling(Id.OperatorFunctionId.Operator);
|
|
else
|
|
Name += Id.Identifier->getName();
|
|
}
|
|
Diag(Id.StartLocation, diag::err_missing_dependent_template_keyword)
|
|
<< Name
|
|
<< FixItHint::CreateInsertion(Id.StartLocation, "template ");
|
|
TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc,
|
|
SS, Id, ObjectType,
|
|
EnteringContext, Template);
|
|
if (TNK == TNK_Non_template)
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case UnqualifiedId::IK_ConstructorName: {
|
|
UnqualifiedId TemplateName;
|
|
bool MemberOfUnknownSpecialization;
|
|
TemplateName.setIdentifier(Name, NameLoc);
|
|
TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
|
|
TemplateName, ObjectType,
|
|
EnteringContext, Template,
|
|
MemberOfUnknownSpecialization);
|
|
break;
|
|
}
|
|
|
|
case UnqualifiedId::IK_DestructorName: {
|
|
UnqualifiedId TemplateName;
|
|
bool MemberOfUnknownSpecialization;
|
|
TemplateName.setIdentifier(Name, NameLoc);
|
|
if (ObjectType) {
|
|
TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc, SS,
|
|
TemplateName, ObjectType,
|
|
EnteringContext, Template);
|
|
if (TNK == TNK_Non_template)
|
|
return true;
|
|
} else {
|
|
TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
|
|
TemplateName, ObjectType,
|
|
EnteringContext, Template,
|
|
MemberOfUnknownSpecialization);
|
|
|
|
if (TNK == TNK_Non_template && !Id.DestructorName.get()) {
|
|
Diag(NameLoc, diag::err_destructor_template_id)
|
|
<< Name << SS.getRange();
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
if (TNK == TNK_Non_template)
|
|
return false;
|
|
|
|
// Parse the enclosed template argument list.
|
|
SourceLocation LAngleLoc, RAngleLoc;
|
|
TemplateArgList TemplateArgs;
|
|
if (Tok.is(tok::less) &&
|
|
ParseTemplateIdAfterTemplateName(Template, Id.StartLocation,
|
|
&SS, true, LAngleLoc,
|
|
TemplateArgs,
|
|
RAngleLoc))
|
|
return true;
|
|
|
|
if (Id.getKind() == UnqualifiedId::IK_Identifier ||
|
|
Id.getKind() == UnqualifiedId::IK_OperatorFunctionId ||
|
|
Id.getKind() == UnqualifiedId::IK_LiteralOperatorId) {
|
|
// Form a parsed representation of the template-id to be stored in the
|
|
// UnqualifiedId.
|
|
TemplateIdAnnotation *TemplateId
|
|
= TemplateIdAnnotation::Allocate(TemplateArgs.size());
|
|
|
|
if (Id.getKind() == UnqualifiedId::IK_Identifier) {
|
|
TemplateId->Name = Id.Identifier;
|
|
TemplateId->Operator = OO_None;
|
|
TemplateId->TemplateNameLoc = Id.StartLocation;
|
|
} else {
|
|
TemplateId->Name = 0;
|
|
TemplateId->Operator = Id.OperatorFunctionId.Operator;
|
|
TemplateId->TemplateNameLoc = Id.StartLocation;
|
|
}
|
|
|
|
TemplateId->Template = Template;
|
|
TemplateId->Kind = TNK;
|
|
TemplateId->LAngleLoc = LAngleLoc;
|
|
TemplateId->RAngleLoc = RAngleLoc;
|
|
ParsedTemplateArgument *Args = TemplateId->getTemplateArgs();
|
|
for (unsigned Arg = 0, ArgEnd = TemplateArgs.size();
|
|
Arg != ArgEnd; ++Arg)
|
|
Args[Arg] = TemplateArgs[Arg];
|
|
|
|
Id.setTemplateId(TemplateId);
|
|
return false;
|
|
}
|
|
|
|
// Bundle the template arguments together.
|
|
ASTTemplateArgsPtr TemplateArgsPtr(Actions, TemplateArgs.data(),
|
|
TemplateArgs.size());
|
|
|
|
// Constructor and destructor names.
|
|
TypeResult Type
|
|
= Actions.ActOnTemplateIdType(Template, NameLoc,
|
|
LAngleLoc, TemplateArgsPtr,
|
|
RAngleLoc);
|
|
if (Type.isInvalid())
|
|
return true;
|
|
|
|
if (Id.getKind() == UnqualifiedId::IK_ConstructorName)
|
|
Id.setConstructorName(Type.get(), NameLoc, RAngleLoc);
|
|
else
|
|
Id.setDestructorName(Id.StartLocation, Type.get(), RAngleLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// \brief Parse an operator-function-id or conversion-function-id as part
|
|
/// of a C++ unqualified-id.
|
|
///
|
|
/// This routine is responsible only for parsing the operator-function-id or
|
|
/// conversion-function-id; it does not handle template arguments in any way.
|
|
///
|
|
/// \code
|
|
/// operator-function-id: [C++ 13.5]
|
|
/// 'operator' operator
|
|
///
|
|
/// operator: one of
|
|
/// new delete new[] delete[]
|
|
/// + - * / % ^ & | ~
|
|
/// ! = < > += -= *= /= %=
|
|
/// ^= &= |= << >> >>= <<= == !=
|
|
/// <= >= && || ++ -- , ->* ->
|
|
/// () []
|
|
///
|
|
/// conversion-function-id: [C++ 12.3.2]
|
|
/// operator conversion-type-id
|
|
///
|
|
/// conversion-type-id:
|
|
/// type-specifier-seq conversion-declarator[opt]
|
|
///
|
|
/// conversion-declarator:
|
|
/// ptr-operator conversion-declarator[opt]
|
|
/// \endcode
|
|
///
|
|
/// \param The nested-name-specifier that preceded this unqualified-id. If
|
|
/// non-empty, then we are parsing the unqualified-id of a qualified-id.
|
|
///
|
|
/// \param EnteringContext whether we are entering the scope of the
|
|
/// nested-name-specifier.
|
|
///
|
|
/// \param ObjectType if this unqualified-id occurs within a member access
|
|
/// expression, the type of the base object whose member is being accessed.
|
|
///
|
|
/// \param Result on a successful parse, contains the parsed unqualified-id.
|
|
///
|
|
/// \returns true if parsing fails, false otherwise.
|
|
bool Parser::ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
|
|
ParsedType ObjectType,
|
|
UnqualifiedId &Result) {
|
|
assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword");
|
|
|
|
// Consume the 'operator' keyword.
|
|
SourceLocation KeywordLoc = ConsumeToken();
|
|
|
|
// Determine what kind of operator name we have.
|
|
unsigned SymbolIdx = 0;
|
|
SourceLocation SymbolLocations[3];
|
|
OverloadedOperatorKind Op = OO_None;
|
|
switch (Tok.getKind()) {
|
|
case tok::kw_new:
|
|
case tok::kw_delete: {
|
|
bool isNew = Tok.getKind() == tok::kw_new;
|
|
// Consume the 'new' or 'delete'.
|
|
SymbolLocations[SymbolIdx++] = ConsumeToken();
|
|
if (Tok.is(tok::l_square)) {
|
|
// Consume the '['.
|
|
SourceLocation LBracketLoc = ConsumeBracket();
|
|
// Consume the ']'.
|
|
SourceLocation RBracketLoc = MatchRHSPunctuation(tok::r_square,
|
|
LBracketLoc);
|
|
if (RBracketLoc.isInvalid())
|
|
return true;
|
|
|
|
SymbolLocations[SymbolIdx++] = LBracketLoc;
|
|
SymbolLocations[SymbolIdx++] = RBracketLoc;
|
|
Op = isNew? OO_Array_New : OO_Array_Delete;
|
|
} else {
|
|
Op = isNew? OO_New : OO_Delete;
|
|
}
|
|
break;
|
|
}
|
|
|
|
#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
|
|
case tok::Token: \
|
|
SymbolLocations[SymbolIdx++] = ConsumeToken(); \
|
|
Op = OO_##Name; \
|
|
break;
|
|
#define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly)
|
|
#include "clang/Basic/OperatorKinds.def"
|
|
|
|
case tok::l_paren: {
|
|
// Consume the '('.
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
// Consume the ')'.
|
|
SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren,
|
|
LParenLoc);
|
|
if (RParenLoc.isInvalid())
|
|
return true;
|
|
|
|
SymbolLocations[SymbolIdx++] = LParenLoc;
|
|
SymbolLocations[SymbolIdx++] = RParenLoc;
|
|
Op = OO_Call;
|
|
break;
|
|
}
|
|
|
|
case tok::l_square: {
|
|
// Consume the '['.
|
|
SourceLocation LBracketLoc = ConsumeBracket();
|
|
// Consume the ']'.
|
|
SourceLocation RBracketLoc = MatchRHSPunctuation(tok::r_square,
|
|
LBracketLoc);
|
|
if (RBracketLoc.isInvalid())
|
|
return true;
|
|
|
|
SymbolLocations[SymbolIdx++] = LBracketLoc;
|
|
SymbolLocations[SymbolIdx++] = RBracketLoc;
|
|
Op = OO_Subscript;
|
|
break;
|
|
}
|
|
|
|
case tok::code_completion: {
|
|
// Code completion for the operator name.
|
|
Actions.CodeCompleteOperatorName(getCurScope());
|
|
|
|
// Consume the operator token.
|
|
ConsumeCodeCompletionToken();
|
|
|
|
// Don't try to parse any further.
|
|
return true;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (Op != OO_None) {
|
|
// We have parsed an operator-function-id.
|
|
Result.setOperatorFunctionId(KeywordLoc, Op, SymbolLocations);
|
|
return false;
|
|
}
|
|
|
|
// Parse a literal-operator-id.
|
|
//
|
|
// literal-operator-id: [C++0x 13.5.8]
|
|
// operator "" identifier
|
|
|
|
if (getLang().CPlusPlus0x && Tok.is(tok::string_literal)) {
|
|
if (Tok.getLength() != 2)
|
|
Diag(Tok.getLocation(), diag::err_operator_string_not_empty);
|
|
ConsumeStringToken();
|
|
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok.getLocation(), diag::err_expected_ident);
|
|
return true;
|
|
}
|
|
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
Result.setLiteralOperatorId(II, KeywordLoc, ConsumeToken());
|
|
return false;
|
|
}
|
|
|
|
// Parse a conversion-function-id.
|
|
//
|
|
// conversion-function-id: [C++ 12.3.2]
|
|
// operator conversion-type-id
|
|
//
|
|
// conversion-type-id:
|
|
// type-specifier-seq conversion-declarator[opt]
|
|
//
|
|
// conversion-declarator:
|
|
// ptr-operator conversion-declarator[opt]
|
|
|
|
// Parse the type-specifier-seq.
|
|
DeclSpec DS;
|
|
if (ParseCXXTypeSpecifierSeq(DS)) // FIXME: ObjectType?
|
|
return true;
|
|
|
|
// Parse the conversion-declarator, which is merely a sequence of
|
|
// ptr-operators.
|
|
Declarator D(DS, Declarator::TypeNameContext);
|
|
ParseDeclaratorInternal(D, /*DirectDeclParser=*/0);
|
|
|
|
// Finish up the type.
|
|
TypeResult Ty = Actions.ActOnTypeName(getCurScope(), D);
|
|
if (Ty.isInvalid())
|
|
return true;
|
|
|
|
// Note that this is a conversion-function-id.
|
|
Result.setConversionFunctionId(KeywordLoc, Ty.get(),
|
|
D.getSourceRange().getEnd());
|
|
return false;
|
|
}
|
|
|
|
/// \brief Parse a C++ unqualified-id (or a C identifier), which describes the
|
|
/// name of an entity.
|
|
///
|
|
/// \code
|
|
/// unqualified-id: [C++ expr.prim.general]
|
|
/// identifier
|
|
/// operator-function-id
|
|
/// conversion-function-id
|
|
/// [C++0x] literal-operator-id [TODO]
|
|
/// ~ class-name
|
|
/// template-id
|
|
///
|
|
/// \endcode
|
|
///
|
|
/// \param The nested-name-specifier that preceded this unqualified-id. If
|
|
/// non-empty, then we are parsing the unqualified-id of a qualified-id.
|
|
///
|
|
/// \param EnteringContext whether we are entering the scope of the
|
|
/// nested-name-specifier.
|
|
///
|
|
/// \param AllowDestructorName whether we allow parsing of a destructor name.
|
|
///
|
|
/// \param AllowConstructorName whether we allow parsing a constructor name.
|
|
///
|
|
/// \param ObjectType if this unqualified-id occurs within a member access
|
|
/// expression, the type of the base object whose member is being accessed.
|
|
///
|
|
/// \param Result on a successful parse, contains the parsed unqualified-id.
|
|
///
|
|
/// \returns true if parsing fails, false otherwise.
|
|
bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
|
|
bool AllowDestructorName,
|
|
bool AllowConstructorName,
|
|
ParsedType ObjectType,
|
|
UnqualifiedId &Result) {
|
|
|
|
// Handle 'A::template B'. This is for template-ids which have not
|
|
// already been annotated by ParseOptionalCXXScopeSpecifier().
|
|
bool TemplateSpecified = false;
|
|
SourceLocation TemplateKWLoc;
|
|
if (getLang().CPlusPlus && Tok.is(tok::kw_template) &&
|
|
(ObjectType || SS.isSet())) {
|
|
TemplateSpecified = true;
|
|
TemplateKWLoc = ConsumeToken();
|
|
}
|
|
|
|
// unqualified-id:
|
|
// identifier
|
|
// template-id (when it hasn't already been annotated)
|
|
if (Tok.is(tok::identifier)) {
|
|
// Consume the identifier.
|
|
IdentifierInfo *Id = Tok.getIdentifierInfo();
|
|
SourceLocation IdLoc = ConsumeToken();
|
|
|
|
if (!getLang().CPlusPlus) {
|
|
// If we're not in C++, only identifiers matter. Record the
|
|
// identifier and return.
|
|
Result.setIdentifier(Id, IdLoc);
|
|
return false;
|
|
}
|
|
|
|
if (AllowConstructorName &&
|
|
Actions.isCurrentClassName(*Id, getCurScope(), &SS)) {
|
|
// We have parsed a constructor name.
|
|
Result.setConstructorName(Actions.getTypeName(*Id, IdLoc, getCurScope(),
|
|
&SS, false),
|
|
IdLoc, IdLoc);
|
|
} else {
|
|
// We have parsed an identifier.
|
|
Result.setIdentifier(Id, IdLoc);
|
|
}
|
|
|
|
// If the next token is a '<', we may have a template.
|
|
if (TemplateSpecified || Tok.is(tok::less))
|
|
return ParseUnqualifiedIdTemplateId(SS, Id, IdLoc, EnteringContext,
|
|
ObjectType, Result,
|
|
TemplateSpecified, TemplateKWLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
// unqualified-id:
|
|
// template-id (already parsed and annotated)
|
|
if (Tok.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId
|
|
= static_cast<TemplateIdAnnotation*>(Tok.getAnnotationValue());
|
|
|
|
// If the template-name names the current class, then this is a constructor
|
|
if (AllowConstructorName && TemplateId->Name &&
|
|
Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
|
|
if (SS.isSet()) {
|
|
// C++ [class.qual]p2 specifies that a qualified template-name
|
|
// is taken as the constructor name where a constructor can be
|
|
// declared. Thus, the template arguments are extraneous, so
|
|
// complain about them and remove them entirely.
|
|
Diag(TemplateId->TemplateNameLoc,
|
|
diag::err_out_of_line_constructor_template_id)
|
|
<< TemplateId->Name
|
|
<< FixItHint::CreateRemoval(
|
|
SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc));
|
|
Result.setConstructorName(Actions.getTypeName(*TemplateId->Name,
|
|
TemplateId->TemplateNameLoc,
|
|
getCurScope(),
|
|
&SS, false),
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->RAngleLoc);
|
|
TemplateId->Destroy();
|
|
ConsumeToken();
|
|
return false;
|
|
}
|
|
|
|
Result.setConstructorTemplateId(TemplateId);
|
|
ConsumeToken();
|
|
return false;
|
|
}
|
|
|
|
// We have already parsed a template-id; consume the annotation token as
|
|
// our unqualified-id.
|
|
Result.setTemplateId(TemplateId);
|
|
ConsumeToken();
|
|
return false;
|
|
}
|
|
|
|
// unqualified-id:
|
|
// operator-function-id
|
|
// conversion-function-id
|
|
if (Tok.is(tok::kw_operator)) {
|
|
if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType, Result))
|
|
return true;
|
|
|
|
// If we have an operator-function-id or a literal-operator-id and the next
|
|
// token is a '<', we may have a
|
|
//
|
|
// template-id:
|
|
// operator-function-id < template-argument-list[opt] >
|
|
if ((Result.getKind() == UnqualifiedId::IK_OperatorFunctionId ||
|
|
Result.getKind() == UnqualifiedId::IK_LiteralOperatorId) &&
|
|
(TemplateSpecified || Tok.is(tok::less)))
|
|
return ParseUnqualifiedIdTemplateId(SS, 0, SourceLocation(),
|
|
EnteringContext, ObjectType,
|
|
Result,
|
|
TemplateSpecified, TemplateKWLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
if (getLang().CPlusPlus &&
|
|
(AllowDestructorName || SS.isSet()) && Tok.is(tok::tilde)) {
|
|
// C++ [expr.unary.op]p10:
|
|
// There is an ambiguity in the unary-expression ~X(), where X is a
|
|
// class-name. The ambiguity is resolved in favor of treating ~ as a
|
|
// unary complement rather than treating ~X as referring to a destructor.
|
|
|
|
// Parse the '~'.
|
|
SourceLocation TildeLoc = ConsumeToken();
|
|
|
|
// Parse the class-name.
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_destructor_tilde_identifier);
|
|
return true;
|
|
}
|
|
|
|
// Parse the class-name (or template-name in a simple-template-id).
|
|
IdentifierInfo *ClassName = Tok.getIdentifierInfo();
|
|
SourceLocation ClassNameLoc = ConsumeToken();
|
|
|
|
if (TemplateSpecified || Tok.is(tok::less)) {
|
|
Result.setDestructorName(TildeLoc, ParsedType(), ClassNameLoc);
|
|
return ParseUnqualifiedIdTemplateId(SS, ClassName, ClassNameLoc,
|
|
EnteringContext, ObjectType, Result,
|
|
TemplateSpecified, TemplateKWLoc);
|
|
}
|
|
|
|
// Note that this is a destructor name.
|
|
ParsedType Ty = Actions.getDestructorName(TildeLoc, *ClassName,
|
|
ClassNameLoc, getCurScope(),
|
|
SS, ObjectType,
|
|
EnteringContext);
|
|
if (!Ty)
|
|
return true;
|
|
|
|
Result.setDestructorName(TildeLoc, Ty, ClassNameLoc);
|
|
return false;
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected_unqualified_id)
|
|
<< getLang().CPlusPlus;
|
|
return true;
|
|
}
|
|
|
|
/// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate
|
|
/// memory in a typesafe manner and call constructors.
|
|
///
|
|
/// This method is called to parse the new expression after the optional :: has
|
|
/// been already parsed. If the :: was present, "UseGlobal" is true and "Start"
|
|
/// is its location. Otherwise, "Start" is the location of the 'new' token.
|
|
///
|
|
/// new-expression:
|
|
/// '::'[opt] 'new' new-placement[opt] new-type-id
|
|
/// new-initializer[opt]
|
|
/// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
|
|
/// new-initializer[opt]
|
|
///
|
|
/// new-placement:
|
|
/// '(' expression-list ')'
|
|
///
|
|
/// new-type-id:
|
|
/// type-specifier-seq new-declarator[opt]
|
|
///
|
|
/// new-declarator:
|
|
/// ptr-operator new-declarator[opt]
|
|
/// direct-new-declarator
|
|
///
|
|
/// new-initializer:
|
|
/// '(' expression-list[opt] ')'
|
|
/// [C++0x] braced-init-list [TODO]
|
|
///
|
|
ExprResult
|
|
Parser::ParseCXXNewExpression(bool UseGlobal, SourceLocation Start) {
|
|
assert(Tok.is(tok::kw_new) && "expected 'new' token");
|
|
ConsumeToken(); // Consume 'new'
|
|
|
|
// A '(' now can be a new-placement or the '(' wrapping the type-id in the
|
|
// second form of new-expression. It can't be a new-type-id.
|
|
|
|
ExprVector PlacementArgs(Actions);
|
|
SourceLocation PlacementLParen, PlacementRParen;
|
|
|
|
SourceRange TypeIdParens;
|
|
DeclSpec DS;
|
|
Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
|
|
if (Tok.is(tok::l_paren)) {
|
|
// If it turns out to be a placement, we change the type location.
|
|
PlacementLParen = ConsumeParen();
|
|
if (ParseExpressionListOrTypeId(PlacementArgs, DeclaratorInfo)) {
|
|
SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
|
|
return ExprError();
|
|
}
|
|
|
|
PlacementRParen = MatchRHSPunctuation(tok::r_paren, PlacementLParen);
|
|
if (PlacementRParen.isInvalid()) {
|
|
SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
|
|
return ExprError();
|
|
}
|
|
|
|
if (PlacementArgs.empty()) {
|
|
// Reset the placement locations. There was no placement.
|
|
TypeIdParens = SourceRange(PlacementLParen, PlacementRParen);
|
|
PlacementLParen = PlacementRParen = SourceLocation();
|
|
} else {
|
|
// We still need the type.
|
|
if (Tok.is(tok::l_paren)) {
|
|
TypeIdParens.setBegin(ConsumeParen());
|
|
ParseSpecifierQualifierList(DS);
|
|
DeclaratorInfo.SetSourceRange(DS.getSourceRange());
|
|
ParseDeclarator(DeclaratorInfo);
|
|
TypeIdParens.setEnd(MatchRHSPunctuation(tok::r_paren,
|
|
TypeIdParens.getBegin()));
|
|
} else {
|
|
if (ParseCXXTypeSpecifierSeq(DS))
|
|
DeclaratorInfo.setInvalidType(true);
|
|
else {
|
|
DeclaratorInfo.SetSourceRange(DS.getSourceRange());
|
|
ParseDeclaratorInternal(DeclaratorInfo,
|
|
&Parser::ParseDirectNewDeclarator);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// A new-type-id is a simplified type-id, where essentially the
|
|
// direct-declarator is replaced by a direct-new-declarator.
|
|
if (ParseCXXTypeSpecifierSeq(DS))
|
|
DeclaratorInfo.setInvalidType(true);
|
|
else {
|
|
DeclaratorInfo.SetSourceRange(DS.getSourceRange());
|
|
ParseDeclaratorInternal(DeclaratorInfo,
|
|
&Parser::ParseDirectNewDeclarator);
|
|
}
|
|
}
|
|
if (DeclaratorInfo.isInvalidType()) {
|
|
SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
|
|
return ExprError();
|
|
}
|
|
|
|
ExprVector ConstructorArgs(Actions);
|
|
SourceLocation ConstructorLParen, ConstructorRParen;
|
|
|
|
if (Tok.is(tok::l_paren)) {
|
|
ConstructorLParen = ConsumeParen();
|
|
if (Tok.isNot(tok::r_paren)) {
|
|
CommaLocsTy CommaLocs;
|
|
if (ParseExpressionList(ConstructorArgs, CommaLocs)) {
|
|
SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
|
|
return ExprError();
|
|
}
|
|
}
|
|
ConstructorRParen = MatchRHSPunctuation(tok::r_paren, ConstructorLParen);
|
|
if (ConstructorRParen.isInvalid()) {
|
|
SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
|
|
return ExprError();
|
|
}
|
|
}
|
|
|
|
return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen,
|
|
move_arg(PlacementArgs), PlacementRParen,
|
|
TypeIdParens, DeclaratorInfo, ConstructorLParen,
|
|
move_arg(ConstructorArgs), ConstructorRParen);
|
|
}
|
|
|
|
/// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be
|
|
/// passed to ParseDeclaratorInternal.
|
|
///
|
|
/// direct-new-declarator:
|
|
/// '[' expression ']'
|
|
/// direct-new-declarator '[' constant-expression ']'
|
|
///
|
|
void Parser::ParseDirectNewDeclarator(Declarator &D) {
|
|
// Parse the array dimensions.
|
|
bool first = true;
|
|
while (Tok.is(tok::l_square)) {
|
|
SourceLocation LLoc = ConsumeBracket();
|
|
ExprResult Size(first ? ParseExpression()
|
|
: ParseConstantExpression());
|
|
if (Size.isInvalid()) {
|
|
// Recover
|
|
SkipUntil(tok::r_square);
|
|
return;
|
|
}
|
|
first = false;
|
|
|
|
SourceLocation RLoc = MatchRHSPunctuation(tok::r_square, LLoc);
|
|
D.AddTypeInfo(DeclaratorChunk::getArray(0, ParsedAttributes(),
|
|
/*static=*/false, /*star=*/false,
|
|
Size.release(), LLoc, RLoc),
|
|
RLoc);
|
|
|
|
if (RLoc.isInvalid())
|
|
return;
|
|
}
|
|
}
|
|
|
|
/// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id.
|
|
/// This ambiguity appears in the syntax of the C++ new operator.
|
|
///
|
|
/// new-expression:
|
|
/// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
|
|
/// new-initializer[opt]
|
|
///
|
|
/// new-placement:
|
|
/// '(' expression-list ')'
|
|
///
|
|
bool Parser::ParseExpressionListOrTypeId(
|
|
llvm::SmallVectorImpl<Expr*> &PlacementArgs,
|
|
Declarator &D) {
|
|
// The '(' was already consumed.
|
|
if (isTypeIdInParens()) {
|
|
ParseSpecifierQualifierList(D.getMutableDeclSpec());
|
|
D.SetSourceRange(D.getDeclSpec().getSourceRange());
|
|
ParseDeclarator(D);
|
|
return D.isInvalidType();
|
|
}
|
|
|
|
// It's not a type, it has to be an expression list.
|
|
// Discard the comma locations - ActOnCXXNew has enough parameters.
|
|
CommaLocsTy CommaLocs;
|
|
return ParseExpressionList(PlacementArgs, CommaLocs);
|
|
}
|
|
|
|
/// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used
|
|
/// to free memory allocated by new.
|
|
///
|
|
/// This method is called to parse the 'delete' expression after the optional
|
|
/// '::' has been already parsed. If the '::' was present, "UseGlobal" is true
|
|
/// and "Start" is its location. Otherwise, "Start" is the location of the
|
|
/// 'delete' token.
|
|
///
|
|
/// delete-expression:
|
|
/// '::'[opt] 'delete' cast-expression
|
|
/// '::'[opt] 'delete' '[' ']' cast-expression
|
|
ExprResult
|
|
Parser::ParseCXXDeleteExpression(bool UseGlobal, SourceLocation Start) {
|
|
assert(Tok.is(tok::kw_delete) && "Expected 'delete' keyword");
|
|
ConsumeToken(); // Consume 'delete'
|
|
|
|
// Array delete?
|
|
bool ArrayDelete = false;
|
|
if (Tok.is(tok::l_square)) {
|
|
ArrayDelete = true;
|
|
SourceLocation LHS = ConsumeBracket();
|
|
SourceLocation RHS = MatchRHSPunctuation(tok::r_square, LHS);
|
|
if (RHS.isInvalid())
|
|
return ExprError();
|
|
}
|
|
|
|
ExprResult Operand(ParseCastExpression(false));
|
|
if (Operand.isInvalid())
|
|
return move(Operand);
|
|
|
|
return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, Operand.take());
|
|
}
|
|
|
|
static UnaryTypeTrait UnaryTypeTraitFromTokKind(tok::TokenKind kind) {
|
|
switch(kind) {
|
|
default: llvm_unreachable("Not a known unary type trait");
|
|
case tok::kw___has_nothrow_assign: return UTT_HasNothrowAssign;
|
|
case tok::kw___has_nothrow_copy: return UTT_HasNothrowCopy;
|
|
case tok::kw___has_nothrow_constructor: return UTT_HasNothrowConstructor;
|
|
case tok::kw___has_trivial_assign: return UTT_HasTrivialAssign;
|
|
case tok::kw___has_trivial_copy: return UTT_HasTrivialCopy;
|
|
case tok::kw___has_trivial_constructor: return UTT_HasTrivialConstructor;
|
|
case tok::kw___has_trivial_destructor: return UTT_HasTrivialDestructor;
|
|
case tok::kw___has_virtual_destructor: return UTT_HasVirtualDestructor;
|
|
case tok::kw___is_abstract: return UTT_IsAbstract;
|
|
case tok::kw___is_class: return UTT_IsClass;
|
|
case tok::kw___is_empty: return UTT_IsEmpty;
|
|
case tok::kw___is_enum: return UTT_IsEnum;
|
|
case tok::kw___is_pod: return UTT_IsPOD;
|
|
case tok::kw___is_polymorphic: return UTT_IsPolymorphic;
|
|
case tok::kw___is_union: return UTT_IsUnion;
|
|
case tok::kw___is_literal: return UTT_IsLiteral;
|
|
}
|
|
}
|
|
|
|
static BinaryTypeTrait BinaryTypeTraitFromTokKind(tok::TokenKind kind) {
|
|
switch(kind) {
|
|
default: llvm_unreachable("Not a known binary type trait");
|
|
case tok::kw___is_base_of: return BTT_IsBaseOf;
|
|
case tok::kw___builtin_types_compatible_p: return BTT_TypeCompatible;
|
|
}
|
|
}
|
|
|
|
/// ParseUnaryTypeTrait - Parse the built-in unary type-trait
|
|
/// pseudo-functions that allow implementation of the TR1/C++0x type traits
|
|
/// templates.
|
|
///
|
|
/// primary-expression:
|
|
/// [GNU] unary-type-trait '(' type-id ')'
|
|
///
|
|
ExprResult Parser::ParseUnaryTypeTrait() {
|
|
UnaryTypeTrait UTT = UnaryTypeTraitFromTokKind(Tok.getKind());
|
|
SourceLocation Loc = ConsumeToken();
|
|
|
|
SourceLocation LParen = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen))
|
|
return ExprError();
|
|
|
|
// FIXME: Error reporting absolutely sucks! If the this fails to parse a type
|
|
// there will be cryptic errors about mismatched parentheses and missing
|
|
// specifiers.
|
|
TypeResult Ty = ParseTypeName();
|
|
|
|
SourceLocation RParen = MatchRHSPunctuation(tok::r_paren, LParen);
|
|
|
|
if (Ty.isInvalid())
|
|
return ExprError();
|
|
|
|
return Actions.ActOnUnaryTypeTrait(UTT, Loc, Ty.get(), RParen);
|
|
}
|
|
|
|
/// ParseBinaryTypeTrait - Parse the built-in binary type-trait
|
|
/// pseudo-functions that allow implementation of the TR1/C++0x type traits
|
|
/// templates.
|
|
///
|
|
/// primary-expression:
|
|
/// [GNU] binary-type-trait '(' type-id ',' type-id ')'
|
|
///
|
|
ExprResult Parser::ParseBinaryTypeTrait() {
|
|
BinaryTypeTrait BTT = BinaryTypeTraitFromTokKind(Tok.getKind());
|
|
SourceLocation Loc = ConsumeToken();
|
|
|
|
SourceLocation LParen = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen))
|
|
return ExprError();
|
|
|
|
TypeResult LhsTy = ParseTypeName();
|
|
if (LhsTy.isInvalid()) {
|
|
SkipUntil(tok::r_paren);
|
|
return ExprError();
|
|
}
|
|
|
|
if (ExpectAndConsume(tok::comma, diag::err_expected_comma)) {
|
|
SkipUntil(tok::r_paren);
|
|
return ExprError();
|
|
}
|
|
|
|
TypeResult RhsTy = ParseTypeName();
|
|
if (RhsTy.isInvalid()) {
|
|
SkipUntil(tok::r_paren);
|
|
return ExprError();
|
|
}
|
|
|
|
SourceLocation RParen = MatchRHSPunctuation(tok::r_paren, LParen);
|
|
|
|
return Actions.ActOnBinaryTypeTrait(BTT, Loc, LhsTy.get(), RhsTy.get(), RParen);
|
|
}
|
|
|
|
/// ParseCXXAmbiguousParenExpression - We have parsed the left paren of a
|
|
/// parenthesized ambiguous type-id. This uses tentative parsing to disambiguate
|
|
/// based on the context past the parens.
|
|
ExprResult
|
|
Parser::ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType,
|
|
ParsedType &CastTy,
|
|
SourceLocation LParenLoc,
|
|
SourceLocation &RParenLoc) {
|
|
assert(getLang().CPlusPlus && "Should only be called for C++!");
|
|
assert(ExprType == CastExpr && "Compound literals are not ambiguous!");
|
|
assert(isTypeIdInParens() && "Not a type-id!");
|
|
|
|
ExprResult Result(true);
|
|
CastTy = ParsedType();
|
|
|
|
// We need to disambiguate a very ugly part of the C++ syntax:
|
|
//
|
|
// (T())x; - type-id
|
|
// (T())*x; - type-id
|
|
// (T())/x; - expression
|
|
// (T()); - expression
|
|
//
|
|
// The bad news is that we cannot use the specialized tentative parser, since
|
|
// it can only verify that the thing inside the parens can be parsed as
|
|
// type-id, it is not useful for determining the context past the parens.
|
|
//
|
|
// The good news is that the parser can disambiguate this part without
|
|
// making any unnecessary Action calls.
|
|
//
|
|
// It uses a scheme similar to parsing inline methods. The parenthesized
|
|
// tokens are cached, the context that follows is determined (possibly by
|
|
// parsing a cast-expression), and then we re-introduce the cached tokens
|
|
// into the token stream and parse them appropriately.
|
|
|
|
ParenParseOption ParseAs;
|
|
CachedTokens Toks;
|
|
|
|
// Store the tokens of the parentheses. We will parse them after we determine
|
|
// the context that follows them.
|
|
if (!ConsumeAndStoreUntil(tok::r_paren, Toks)) {
|
|
// We didn't find the ')' we expected.
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return ExprError();
|
|
}
|
|
|
|
if (Tok.is(tok::l_brace)) {
|
|
ParseAs = CompoundLiteral;
|
|
} else {
|
|
bool NotCastExpr;
|
|
// FIXME: Special-case ++ and --: "(S())++;" is not a cast-expression
|
|
if (Tok.is(tok::l_paren) && NextToken().is(tok::r_paren)) {
|
|
NotCastExpr = true;
|
|
} else {
|
|
// Try parsing the cast-expression that may follow.
|
|
// If it is not a cast-expression, NotCastExpr will be true and no token
|
|
// will be consumed.
|
|
Result = ParseCastExpression(false/*isUnaryExpression*/,
|
|
false/*isAddressofOperand*/,
|
|
NotCastExpr,
|
|
ParsedType()/*TypeOfCast*/);
|
|
}
|
|
|
|
// If we parsed a cast-expression, it's really a type-id, otherwise it's
|
|
// an expression.
|
|
ParseAs = NotCastExpr ? SimpleExpr : CastExpr;
|
|
}
|
|
|
|
// The current token should go after the cached tokens.
|
|
Toks.push_back(Tok);
|
|
// Re-enter the stored parenthesized tokens into the token stream, so we may
|
|
// parse them now.
|
|
PP.EnterTokenStream(Toks.data(), Toks.size(),
|
|
true/*DisableMacroExpansion*/, false/*OwnsTokens*/);
|
|
// Drop the current token and bring the first cached one. It's the same token
|
|
// as when we entered this function.
|
|
ConsumeAnyToken();
|
|
|
|
if (ParseAs >= CompoundLiteral) {
|
|
TypeResult Ty = ParseTypeName();
|
|
|
|
// Match the ')'.
|
|
if (Tok.is(tok::r_paren))
|
|
RParenLoc = ConsumeParen();
|
|
else
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
if (ParseAs == CompoundLiteral) {
|
|
ExprType = CompoundLiteral;
|
|
return ParseCompoundLiteralExpression(Ty.get(), LParenLoc, RParenLoc);
|
|
}
|
|
|
|
// We parsed '(' type-id ')' and the thing after it wasn't a '{'.
|
|
assert(ParseAs == CastExpr);
|
|
|
|
if (Ty.isInvalid())
|
|
return ExprError();
|
|
|
|
CastTy = Ty.get();
|
|
|
|
// Result is what ParseCastExpression returned earlier.
|
|
if (!Result.isInvalid())
|
|
Result = Actions.ActOnCastExpr(getCurScope(), LParenLoc, CastTy, RParenLoc,
|
|
Result.take());
|
|
return move(Result);
|
|
}
|
|
|
|
// Not a compound literal, and not followed by a cast-expression.
|
|
assert(ParseAs == SimpleExpr);
|
|
|
|
ExprType = SimpleExpr;
|
|
Result = ParseExpression();
|
|
if (!Result.isInvalid() && Tok.is(tok::r_paren))
|
|
Result = Actions.ActOnParenExpr(LParenLoc, Tok.getLocation(), Result.take());
|
|
|
|
// Match the ')'.
|
|
if (Result.isInvalid()) {
|
|
SkipUntil(tok::r_paren);
|
|
return ExprError();
|
|
}
|
|
|
|
if (Tok.is(tok::r_paren))
|
|
RParenLoc = ConsumeParen();
|
|
else
|
|
MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
return move(Result);
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|
}
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